/* $Id$
This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
+Copyright © 2007-2008 Mikko Rasa, Mikkosoft Productions
Distributed under the LGPL
*/
namespace Msp {
namespace GL {
+vector<TexUnit> TexUnit::units;
+TexUnit *TexUnit::cur_unit = 0;
+
TexUnit::TexUnit():
- texture(0)
+ texture(0),
+ texenv(0)
+{ }
+
+bool TexUnit::set_texture(const Texture *tex)
{
+ bool result = (tex!=texture);
+ texture = tex;
+ return result;
}
-bool TexUnit::set_texture(const Texture *tex)
+bool TexUnit::set_texenv(const TexEnv *env)
{
- bool result=(tex!=texture);
- texture=tex;
+ bool result = (texenv!=env);
+ texenv = env;
return result;
}
+unsigned TexUnit::get_n_units()
+{
+ static int count = -1;
+ if(count<0)
+ {
+ if(is_version_at_least(2, 0) || is_supported("ARB_vertex_shader"))
+ glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &count);
+ else if(is_version_at_least(1, 3))
+ glGetIntegerv(GL_MAX_TEXTURE_UNITS, &count);
+ else
+ count = 1;
+ }
+ return count;
+}
+
TexUnit &TexUnit::activate(unsigned n)
{
+ if(n>=get_n_units())
+ throw InvalidParameterValue("Invalid texture unit number");
+
if(units.size()<=n)
units.resize(n+1);
if(cur_unit!=&units[n] && (cur_unit || n))
- {
- static RequireVersion _ver(1, 3);
glActiveTexture(GL_TEXTURE0+n);
- }
- cur_unit=&units[n];
+ cur_unit = &units[n];
return units[n];
}
return *cur_unit;
}
-vector<TexUnit> TexUnit::units;
-TexUnit *TexUnit::cur_unit=0;
-
} // namespace GL
} // namespace Msp